GCD and LCM of two numbers

#include<stdio.h>
int main ()
{
    int num1,num2,n1,n2,rem,GCD,LCM;
    printf("Enter the numbers:");
    scanf("%d%d", &num1, &num2);
    n1=num1;
    n2=num2;
    while (n2!=0)
    {
        rem=n1%n2;
        n1=n2;
        n2=rem;
    }
    GCD=n1;
    printf("GCD=%d\n", GCD);
    LCM=(num1*num2)/GCD;
    printf("LCM=%d\n", LCM);
    return 0;
}